Oil change intervals 15,000 miles. I think that is too long and for $60 I change my own. Did my first change at 5000miles gonna change every 10,000 miles or once a year.
My air suspension will leak down after a day or so of setting. I always start mine and using the resume button on the cruise bring the idle up to 1000 until it comes up to temp before I ever move. The suspension pumps back up after a minute or so. I can't hear any air leaks tho.
I run 95psi cold tire pressure but there is a guide for the optimal tire pressure per tire load.